Smc Pneumatics KQ2U04-02AS Y-connector Tube Fitting

Product Description

The SMC PNEUMATICS KQ2U04-02AS is a push-to-connect Y-connector tube fitting designed for pneumatic and fluid distribution systems. Constructed from brass with a polybutylene tube contact body, this fitting accepts 4 mm outside-diameter tubing and provides a reliable three-way branch connection without tools. It is rated for a maximum working pressure of 145 psi and operates across a temperature range of 23 degrees F to 140 degrees F. BSPT thread ensures compatibility with standard British tapered pipe thread ports. Technicians and pipefitters working on compressed air lines, pneumatic control circuits, and similar low-to-medium pressure systems install this fitting for fast, leak-resistant tubing splits.

The KQ2U04-02AS is suited for residential and light commercial pneumatic control applications, instrument air distribution, and general-purpose tubing runs where a Y-branch is required. Its compact overall length of approximately 40.9 mm makes it practical in tight panel or enclosure installations. The push-to-connect design speeds up assembly and allows tubing to be released and repositioned without replacing the fitting, which is useful during system commissioning or troubleshooting.

Key Features

• Push-to-connect design for tool-free tubing insertion and release
• Y-connector configuration provides a three-way branch in a single fitting
• Brass body construction for durability in pneumatic service
• Rated to 145 psi maximum working pressure
• BSPT thread type for compatibility with British tapered pipe thread ports
• RoHS compliant materials

Compatibility

Designed as an OEM-style push-to-connect replacement or addition for pneumatic tubing systems using 4 mm outside-diameter tubing and 1/4 inch BSPT threaded ports.

Installation Notes

Installation is typically performed by a licensed pipefitter, pneumatic technician, or qualified industrial maintenance technician. Depressurize and lock out the pneumatic circuit before installing or removing any fittings. Ensure the mating port threads are BSPT and apply appropriate thread sealant per the system manufacturer's guidelines. Verify that tubing is cut cleanly and squarely and is fully seated in the fitting before restoring system pressure.